Let n be the number of priests (in thousands) at t years since 1980.
a. Identify the explanatory and response variables.
b. Construct a scatterplot by hand.
c. Is the association positive, negative, or neither? What does that mean in this situation?
d. Graph the model n = - 0.65t + 59.07 by hand on the scatterplot. Does the line come close to the data points?
e. Use the model to estimate the number of priests in 2011. Did you perform interpolation or extrapolation?